Preffair Audiophile Speaker Isolation Spikes Aluminum Record Player Shock Absorber Speaker Floor Protector Mat Adjustable Subwoofer Anti Vibration Pads Non-Slip LP Vinyl Record Player Base

Could not get a satisfactory tuning of my subs to the rest of my 5.1 system. I suspected sub was coupling to the floor. Isolation spikes did what they were supposed to do, now have great clean sub base. Before I had to reduce the sub volume by 9db. When I installed the Isolation Spikes, I had to increase the sub volume, which brought the entire surround system into balance. Absolutely wonderful. Now base frequencies are clear distinct and accurate and properly aligned with my main speakers. They are well made and worth there price.Note to negative reviewers: trying to mount them under the already installed feet will not work, I tried that, and will will make your devices unstable. It even moved tore the rubber pads from the isolation device. Remove the feet from your sub/turntable/speakers, and mount the isolators to the FLAT surface of those devices. Forces from my sub where such that it rotated the sub. Now with the isolators the sub stays in place. All in my first review are still valid.

Installé sous ma table tournante, ça a changé tellement l' isolation que je peux sauter dans le salon, claquer la porte et la musique continue sans soubresauts! Très esthétique aussi.

My turntable feet were not adjustable and these were an easy cheap fix to get it dead level. They are pretty small so I'm not sure id use them for large speaker isolation but worked great for my needs.

Initially doubting the placement of a bass speaker on four small pieces ... it was not only simple but a very effective way to avoid the floor absorbing all of the bass by raising it - only slightly. Surprisingly effective!

The media could not be loaded.  Use these on my 4K Sony blu-ray player because it did not come with feet, just came with little square pieces of rubber.